232542521 has 4 divisors (see below), whose sum is σ = 238827492. Its totient is φ = 226257552.

The previous prime is 232542517. The next prime is 232542547. The reversal of 232542521 is 125245232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 211382521 + 21160000 = 14539^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 232542521 - 2² = 232542517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (232542571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142430 + ... + 3142503.

It is an arithmetic number, because the mean of its divisors is an integer number (59706873).

Almost surely, 2^232542521 is an apocalyptic number.

It is an amenable number.

232542521 is a deficient number, since it is larger than the sum of its proper divisors (6284971).

232542521 is an equidigital number, since it uses as much as digits as its factorization.

232542521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284970.

The product of its digits is 4800, while the sum is 26.

The square root of 232542521 is about 15249.3449367506. The cubic root of 232542521 is about 614.9419567580.

Adding to 232542521 its reverse (125245232), we get a palindrome (357787753).

The spelling of 232542521 in words is "two hundred thirty-two million, five hundred forty-two thousand, five hundred twenty-one".